HP A3312A - Manual (Page 51)

Troubleshooting & Diagnostics
Troubleshooting Procedures
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Troubleshooting
Troubleshooting Procedures
This section contains troubleshooting procedures for the storage systems.
SCSI Bus Troubleshooting Procedure
If the host cannot access any of the devices connected to the SCSI bus, check the following:
1. Check SCSI cables for loose connections and bent pins.
2. Check SCSI terminator connections. A differential terminator on a single-ended bus or a single-ended
terminator on a differential bus will cause the bus to hang. If a terminator is missing, storage system
modules may not pass power-on self-test.
3. Check the SCSI ID switches for conflicting SCSI ID numbers.
4. Check the host bus adapter to see if it includes on-board termination and termination power, or if they
must be supplied externally.
5. Reseat all storage modules.
If there is a SCSI bus problem with a disk module, see Table 10.